Questions tagged [inductive]

In the context of electronics, inductive refers to circuits that use magnetic fields, for things such as power or data transfer or sensing metal objects

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Inductive Proximity Sensor Proteus Simulation

Do you know how can I simulate in Proteus a similar component to the Inductive Proximity Sensor? I don't find it on the default libraries Is it recommended to simulate every single component?
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574 views

P-MOSFET failing

I am using this solution to drive a large (huge) relay on a boat. The system works well for months on end, but eventually the MOSFET (T2) dies suddenly. I have modified the schematic to include the ...
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77 views

2n7000 used for inductively coupled load modulation apparently latched

So I've got a fairly basic circuit set up for load modulation of an inductively coupled circuit: A few notes on the above: LC's were designed for 1 MHz but work better at 950 kHz, thus the chosen ...
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81 views

Protecting an IO pin from a spike

I am building a circuit which communicates with an external Power Supply via UART. One of the IO pins from my MCU is connected to an optocoupler I have 4 relays on my PCB, they are separated ...
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59 views

Fake energy saver inductive loads

I watched this video on YouTube, it covered fake energy saving devices. I have seen many of these fake devices and they all seem to use a capacitor. My question is why would they bother? The person ...
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67 views

Conditioning input power supply on PCB

I have had issues in the past with using too close of an input power supply to the max rating of my main power regulator causing failures. For example, I used a 24VDC supply with a regulator with an ...
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59 views

P-Channel MOSFET reverse polarity protection on NMOS array chip

I'm trying to achieve reverse polarity protection for the TPL7404LADR chip which is basically an updated version of the ULN2003 darling transistor array. To do this I want to use a P Channel MOSFET ...
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26 views

Inducitve Proximity Sensor - Safety Gate Latch Codes?

If I am using an inductive proximity sensors as a safety gate latch, what codes and standards do I need to abide by? Some safety sensors I research have: - Category 3 (EN ISO 13849) - Safety ...
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72 views

Ideal LC circuit decays over time in LTspice

I was trying to simulate a transformer without a load, and setting an initial condition to observe how the energy will flow from the primary to the secondary circuit. I realized that the energy will ...
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41 views

Can a transformer damage a function generator?

I was playing around with a Siglent SDG 1032X and a small transformer, that I have directly connected to the generator's output, when I have reached the over voltage protection: I have accidentally ...
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1answer
99 views

ADC oscillation problem with inductive load

ADC in question is onboard ATMega168 micro controller. Relevant parts of the circuit look like this: simulate this circuit – Schematic created using CircuitLab Now I know AVCC is recommended ...
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1answer
54 views

PL-08N inductive sensor not turning off

I have one of these inductive sensors marked as PL-08N which should work within a 4-30VDC range and trigger at 8mm or less. I wired it as described below, with my ...
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119 views

Advice on choosing components for a flyback arrangement, for switching inductive loads fast

I have a bank of x6 MOSFETs (SUG90090E) connected in parallel, which I am using to switch a current of maximum 30A through a coil (resistance 1R and inductance 1mH), and am looking for some general ...
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What would happen if you accidentally casually put your apple watch on a wireless charger meant for phones or other higher power devices for hours? [closed]

What would happen if you accidentally, casually (because they're supposed to be so convenient!) put your apple watch on a wireless charger meant for phones or other higher power devices for hours? Or ...
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How to safely switch a big inductive load with a Triac using a capacitor snubber?

I am building a Spot Welder with a big powerful transformer. I have to switch a big inductive load of 70mH (input of a transformer) The switching will be done with an SSR (Opto Triac Zero crossing SSR-...
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62 views

WPT compensation topologies

I'm experimenting with compensation topologies for inductive WPT systems and have a small confusion. The general WPT industry uses compensation networks to cancel out reactive components in the ...
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3answers
121 views

Why does the voltage induced in the receiver coil of this WPT circuit decrease when a load is added (in parallel)?

The following is a circuit that wirelessly transfers power via inductive coupling. The circuit is supposed to power a 12 V 0.15 A DC fan and a typical smartphone, which requires 5 V DC across it. The ...
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80 views

What's causing the audible 7/8th rhythm in Qi chargers?

I have a wireless Qi charging system for my mobile phone. When I put the phone into the cradle it starts getting charged and I can hear a very quiet noise coming from the arrangement. Other ...
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1answer
36 views

Inductive loading in ADSL lines?

I have read that a significant drawback of telephone lines, one that makes difficult fast digital data transmission is the fact that they are inductively loaded. Now in telephone ADSL lines, are these ...
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199 views

IGBT destroyed. Help me identify any potential problems

I am trying to build an inductive oven control (for temperatures up to 1500 C), that controls the temperature by turning on the the inductive oven on and off like a commercial inductive hotplate. ...
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307 views

Minimal components for lighting an LED via wireless power transfer

I understand the basic concept of wireless power transfer. I wanted to make some wireless LEDs (Similar to this concept) and was trying to figure out the minimum component count I required in order ...
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32 views

How does electromagnetism factor into inductively coupled RFID systems

LF and HF RFID systems use inductive coupling to supply the tag with power. UHF RFID systems use antennas to send electromagnetic waves, the power supplied to the tag comes from the transmitted ...
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267 views

Controlling the Spark plug using 555 IC

I built the circuit for ignition system using MOSFET, 555, ignition coil(specs unknown. But current rating is more than 2 A and less than 10 A), SMPS(12 V, 10 A for powering the the whole circuit). ...
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317 views

Protecting a power supply from inductive load

I recently got a PeakTech 6225A power supply for my hobby of making/"tinkering"/messing around. I get many parts that I want power separately to diagnose them. I also get a lot of electromotors and ...
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43 views

How to spec out a relay correctly

I have a load that I am trying to switch with a relay. The load to the relay is an autotransformer. The wiper output of the autotransformer is (2) 120:30 step down transformers with each having 150W ...
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1answer
60 views

Inductive Charging 2 layer coil transfer to 1 layer receiver. Any issues?

I am looking to incorporate a inductive charging mechanism into a project I’m working on. On the receiving side I only have room for a single layer coil design. For my transfer side I have more ...
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2answers
200 views

Can every voltage source accept fly-back diode's current?

A diode is used parallel to the motor (or inductive load) in order to prevent damage to the switch because of back-emf voltage. Now, that back-emf voltage actually produces a current and by using a ...
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67 views

Inductive proximity sensor and target design

I am thinking of using the LDC1612 by TI to sense position over a 0 to 10mm range with an accuracy better than 100nm. I have been told this is possible by a TI engineer. However, my question concerns ...
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182 views

T.I H-Bridge design with No protection diodes?

I am still on my struggle trying to design my own Brushed DC H-bridge with all N-MOS, still in the research stage and burning mosfets left and right. I have come across this T.I design ,relatively ...
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867 views

arduino controlled spark plug with ignition coil

I am trying to built a ignition system which will have the following Spark plug Ignition coil (I don't know the spec of these. but this one is from Honda Activa) Some switching circuit I found ...
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97 views

DC/DC step-down regulator destruction because of inductive load?

I was evaluating PAM2316 DC/DC step-down converter and destroyed several of them, I suppose the cause could be an inductive load. See my schematic and my layout here: Let me explain: The circuit was ...
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3answers
717 views

Npn transistor failed to work

Sometimes after long time working correctly and turning on and off inductive load, Darlington NPN transistor (ONSEMI BD679) which should follow signal (IN4), fails to work and turns on inductive load ...
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29 views

How do I find the power factor and the equivalent inductivity value for this given scheme?

My exam is in 2 days and I just can't figure this thing out. I have the following scheme: First I was asked to find out the impedance, resistance and reactance of the dipole given below. This is what ...
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1answer
62 views

Circuit for detecting signal inversion

I am using two inductors on both sides of an ac carrying straight wire and want to detect their proximity from the wire. The coils are a set distance apart and move together laterally via mechanical ...
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1k views

Desktop PC power supply is Inductive or resistive loads?

Our daily computers (Desktop PC, Server or normal laptop, mobile chargers) are those power supply inductive or resistive loads?
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60 views

Can you pair a compass or magnetometer with an induction circuit to create a form of metal detector?

A compass or magnetometer by themselves can only detect/measure magnetic fields, and thus would normally only be able to detect ferrous metals and (possibly) some active electrical circuits in ...
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75 views

How do inductive chargers detect a load?

For a wireless inductive charger, I understand the basic operating principle. I have a question regarding the operation of such chargers when no "load" is "connected". How do they detect the presence ...
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3answers
81 views

What specifies how much energy can be disspated in an IGBT when switching off?

I am driving an inductive load with an inductance \$L = 500\mu H\$ with a steady-state current of \$I = 300A\$. I would like to switch this current off quickly, and I plan on using an IGBT to do so. ...
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240 views

Effects of rapidly pulsing DC inductive load on solid state relays

I'd like to use some solid state relays to turn on and off a high voltage, low current DC inductive circuit (120-150VDC, 20-60ma). The SSR would only be switched on and off at a maximum of once every ...
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613 views

Driving inductive load from IC with MOSFET

I am designing a driver circuit to drive a hydraulic proportional valve from an IC's PWM output. (IC is ATmega 2560). The coils on the valve draw approx 3Amps at %100 duty cycle with a power supply of ...
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263 views

Triac misfires because of noise from inductive loads

The product is a wifi enabled smart switching device. One device has 4 different channel for four different appliances to be connected to the product. Each channel has a pair of optocoupler and triac ...
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2answers
976 views

Transistor as a switch, what does the inductor do?

I dont understand what the inductor in this circuit is actually doing. Is there a current flowing through the coil when my input is 0 ? If so, it should be DC so the coil isnt really doing anything ...
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136 views

What type of resistor component is this?

I have an RCA Victor 35x tube radio and I need to know what type of resistor this is and what it's purpose is? There is some wire wrapped around the resistor and it's attached to the antenna. ...
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72 views

Relay Max Inductive Current

I have a few of these(http://old.ghielectronics.com/downloads/man/20084141716341001RelayX1.pdf) and I was looking at the data sheet. It states that the max inductive load is 7amp(3 on form C). Does ...
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167 views

Can an analog inductive proximity sensor be used to discriminate between different types of metal (aluminum and steel)?

I am attempting to create a robot that will sort aluminum from steel automatically via an arduino. The code is essentially: if steel, do X, if aluminum, then do Y. I am using an analog inductive ...
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113 views

Short range wireless pulse transmission in wind anemometer

I have an old windmil-type anemometer, something like this: (Illustrative image, the real unit is 40+ year old soviet-made device with presumably no operational active components inside) My project ...
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329 views

Can I add flyback diodes to my car window motors?

I have an older car with a known issue with the window switches: they carry all the motor current, and after a while the contacts suffer carbon buildup presumably from flyback arcing. Commonly, owners ...
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158 views

Comparison of energy storage density of inductive and capacitive systems

In the paper A Review of Short Pulse Generator Technology by John Mankowski (IEEE Transactions on Plasma Science, Vol. 28, No. 1, 2000, pp 102-108) I found that "energy density of inductive storage ...
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404 views

triac controlled voltage preregulator (mains)

At present I am rebuilding an 1990 Elektor powersupply with a triac controlled preregulator able to handle inductive loads. My intention is to modernise the design but first I want it to be ...
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171 views

Reducing Inductive Kick when Switching Audio Transformer

I have a circuit where I'm switching the primary of an audio transformer using relay NO/NC contacts. A partial schematic is shown. The problem is that I'm getting inductive kick whenever the ...